https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98725
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:ec153f96f8943f1d2418d2248ed219358990bb5f commit r11-6771-gec153f96f8943f1d2418d2248ed219358990bb5f Author: Jonathan Wakely <jwak...@redhat.com> Date: Mon Jan 18 14:23:13 2021 +0000 libstdc++: Only test writing to wostream if supported [PR 98725] libstdc++-v3/ChangeLog: PR libstdc++/98725 * testsuite/20_util/unique_ptr/io/lwg2948.cc: Do not try to write to a wide character stream if wide character support is disabled in the library.